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powerpc/eeh: Make EEH handler PE sensitive 

Once eeh error is found, eeh event will be created and put it into
the global linked list. At the mean while, kernel thread will be
started to process it. The handler for the kernel thread originally
was eeh device sensitive.

The patch reworks the handler of the kernel thread so that it's PE
sensitive.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Gavin Shan 2012-09-07 22:44:18 +00:00 committed by Benjamin Herrenschmidt
parent c270a24c59
commit 120dc49661
1 changed files with 10 additions and 15 deletions
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25
arch/powerpc/platforms/pseries/eeh_event.c
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@ -57,7 +57,7 @@ static int eeh_event_handler(void * dummy)
{
unsigned long flags;
struct eeh_event *event;
struct eeh_dev *edev;
struct eeh_pe *pe;
set_task_comm(current, "eehd");
@ -76,28 +76,23 @@ static int eeh_event_handler(void * dummy)
/* Serialize processing of EEH events */
mutex_lock(&eeh_event_mutex);
edev = event->edev;
eeh_mark_slot(eeh_dev_to_of_node(edev), EEH_MODE_RECOVERING);
printk(KERN_INFO "EEH: Detected PCI bus error on device %s\n",
eeh_pci_name(edev->pdev));
pe = event->pe;
eeh_pe_state_mark(pe, EEH_PE_RECOVERING);
pr_info("EEH: Detected PCI bus error on PHB#%d-PE#%x\n",
pe->phb->global_number, pe->addr);
set_current_state(TASK_INTERRUPTIBLE); /* Don't add to load average */
edev = handle_eeh_events(event);
if (edev) {
eeh_clear_slot(eeh_dev_to_of_node(edev), EEH_MODE_RECOVERING);
pci_dev_put(edev->pdev);
}
handle_eeh_events(event);
eeh_pe_state_clear(pe, EEH_PE_RECOVERING);
kfree(event);
mutex_unlock(&eeh_event_mutex);
/* If there are no new errors after an hour, clear the counter. */
if (edev && edev->freeze_count>0) {
if (pe && pe->freeze_count > 0) {
msleep_interruptible(3600*1000);
if (edev->freeze_count>0)
edev->freeze_count--;
if (pe->freeze_count > 0)
pe->freeze_count--;
}